Adjust oven rack to center position and heat oven to 350 degrees. Rub bottom and sides of 5- to 6-cup gratin dish or shallow baking dish with garlic. Mince remaining garlic and set aside. Once garlic in dish has dried, about 2 minutes, spread dish with half the butter.

Bake until top is golden brown (basting once or twice during first 45 minutes) about 1 hour 15 minutes. Let rest 5 minutes and serve.

Pairs Well With

Notes

Look for a good-quality Gruyre which will be mellow and nutty. For a more pronounced crust, sprinkle three tablespoons of heavy cream or grated Gruyre cheese on top of the potatoes after forty-five minutes of baking.